Bill includes controversial measure to combat currency manipulation

WASHINGTON—The Senate passed a bill to crack down on unfair foreign-trade practices, in a push to ensure that an emerging trade pact sought by President Barack Obama is accompanied by tough enforcement of trade rules.

The vote on the bill, a customs measure that includes provisions aimed at cracking down on currency manipulation and bolstering the enforcement of trade rules, was 78-20. Its passage followed days of rocky negotiations over the path of a measure that would expedite approval of trade deals, most immediately...